CN108974947A - A kind of drilling platforms drilling cuttings conveying device and its control method - Google Patents
A kind of drilling platforms drilling cuttings conveying device and its control method Download PDFInfo
- Publication number
- CN108974947A CN108974947A CN201810958743.8A CN201810958743A CN108974947A CN 108974947 A CN108974947 A CN 108974947A CN 201810958743 A CN201810958743 A CN 201810958743A CN 108974947 A CN108974947 A CN 108974947A
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- China
- Prior art keywords
- valve
- transfer pot
- feed hopper
- drilling
- drilling cuttings
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/06—Gas pressure systems operating without fluidisation of the materials
- B65G53/10—Gas pressure systems operating without fluidisation of the materials with pneumatic injection of the materials by the propelling gas
- B65G53/12—Gas pressure systems operating without fluidisation of the materials with pneumatic injection of the materials by the propelling gas the gas flow acting directly on the materials in a reservoir
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/36—Arrangements of containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/46—Gates or sluices, e.g. rotary wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
Abstract
The present invention provides a kind of drilling platforms drilling cuttings conveying device and its control methods, which includes: feed hopper, for collecting drilling cuttings；Vibration device is mounted on feed hopper；Transfer pot, positioned at the lower section of feed hopper, the import of transfer pot is connected with the discharge port of feed hopper by the first valve to be opened/closed, and the outlet of transfer pot is equipped with the second valve to be opened/closed；Air inlet pipe is connected with transfer pot, for feeding pressed gas into transfer pot；Discharge port snorkel is connected on the discharge port side wall of transfer pot, for blowing pressed gas outward from discharge port；And exhaust pipe, one end is connected with transfer pot, the other end is connected with exhaust valve.The device uses positive-pressure closing mode of movement, realize over long distances, big drop climb conveying, the degree of automation, reduction pollutant water clock risk is substantially improved.
Description
Technical field
Present document relates to drilling platforms equipment technical field, espespecially a kind of drilling platforms drilling cuttings conveying device and a kind of drilling well are flat
The control method of bench drill bits conveying device.
Background technique
In oil-gas field development drillng operation, the drilling cuttings in pit shaft can be brought back ground with the circulation of drilling fluid.It carries
The drilling fluid of drilling cuttings is separated by solid-liquid separation by solid controlling system (including vibrating screen and centrifuge).Solid phase (that is: drilling cuttings) after separation needs
It to be transported to designated position by a set of transmitting device and be discharged or collected.Domestic petroleum industry is passed for drilling cuttings at present
Defeated common practice is conveyed using non-closed transmission mode, such as helical feed, transmission belt.But with petroleum industry ring
The promotion of guaranteed request and mud do not land the popularization of work pattern, and non-closed transmission mode can not meet requirement.
Summary of the invention
In order to solve the above-mentioned technical problem at least one of, there is provided herein a kind of drilling platforms drilling cuttings conveying device,
Using positive-pressure closing mode of movement, realize over long distances, big drop climb conveying, the degree of automation, reduction pollutant is substantially improved
Water clock risk.
Drilling platforms drilling cuttings conveying device provided by the invention, comprising: feed hopper, for collecting drilling cuttings；Vibration device, peace
On the feed hopper；Transfer pot, positioned at the lower section of the feed hopper, the import of the transfer pot goes out with the feed hopper
Material mouth is connected by the first valve to be opened/closed, and the outlet of the transfer pot is equipped with the second valve to be opened/closed；Air inlet pipe,
It is connected with the transfer pot, for feeding pressed gas into the transfer pot；Discharge port snorkel is connected to the conveying
On the discharge port side wall of tank, for blowing pressed gas outward from the discharge port；And exhaust pipe, one end and the transfer pot phase
Connection, the other end are connected with exhaust valve.
Optionally, the purging gas nozzle for assisting blanking is equipped on the feed hopper and the inner wall of transfer pot.
Optionally, the drilling platforms drilling cuttings conveying device further include: control device, the air inlet pipe, the discharge port
Snorkel and the purging gas nozzle are respectively connected with switch valve, are connected with pressure sensor on the exhaust pipe, on the feed hopper
It is provided with level sensor, multiple switch valves, first valve, second valve, the exhaust valve, the pressure
Sensor and the level sensor are electrically connected with the control device.
Optionally, the purging gas nozzle includes shell, push rod and spring, and gas channel was formed on the shell, described
Push rod is movably installed on the gas channel excessively, is mounted on institute to open and close gas channel, the spring excessively
It states between shell and the push rod, for resetting the push rod.
Optionally, the purging gas nozzle in the feed hopper and the transfer pot is 3~6.
Optionally, the feed hopper is the taper bucket, and the vibration device is mounted on the lateral surface of the taper bucket, described
Operation panel is provided on control device.
Optionally, first valve and second valve are isolating valve, the isolating valve include valve seat, valve plate and
Sealed bladder is formed with material passing passage on the valve seat, and the valve plate is installed in rotation in the material passing passage, the sealing
Capsule is mounted in the material passing passage, seals the material passing passage for matching with the valve plate.
Optionally, charging cylinder, the charging cylinder and the feed hopper are provided at the feed inlet of the feed hopper
Vibration isolation set is provided between feed inlet and between the discharge port of the feed hopper and the import of the transfer pot.
Optionally, the drilling platforms drilling cuttings conveying device further include: frame, the feed hopper and the transfer pot are pacified
On said frame, the vibration device is mounted on the lateral surface of the feed hopper dress.
The control method of drilling platforms drilling cuttings conveying device provided by the invention, comprising:
Exhaust valve, the first valve and vibration device are opened, the second valve is closed, falls to the drilling cuttings collected in feed hopper
In transfer pot；
After drilling cuttings enters transfer pot, exhaust valve, the first valve and vibration device are closed, opens the second valve, air inlet pipe
It is passed through pressed gas with discharge port snorkel, by pressed gas by the drilling cuttings in transfer pot from the discharge port of transfer pot to unofficial biography
It is defeated.
Compared with prior art, drilling platforms drilling cuttings conveying device provided by the invention, using positive-pressure closing mode of movement,
Realize over long distances, big drop climb conveying, the degree of automation, reduction pollutant water clock risk is substantially improved.
Further, it by control device automation control, improves automation degree of equipment, reduce operating personnel's work
Make intensity, improves operating environment, enhance transfer efficiency of climbing, reduce equipment area occupied, realize maximum ring
Guaranteed request.
The other feature and advantage of this paper will illustrate in the following description, also, partly become from specification
It is clear that by implementing to understand herein.The purpose of this paper and other advantages can be by specifications, claims
And specifically noted structure is achieved and obtained in attached drawing.
Detailed description of the invention
Attached drawing is used to provide to further understand this paper technical solution, and constitutes part of specification, with this Shen
Embodiment please is used to explain the technical solution of this paper together, does not constitute the limitation to this paper technical solution.
Fig. 1 is the structural schematic diagram of drilling platforms drilling cuttings conveying device described in one embodiment of the invention.
Fig. 2 is the structural schematic diagram of feed hopper in Fig. 1.
Fig. 3 is the structural schematic diagram of transfer pot in Fig. 1.
Fig. 4 is the structural schematic diagram that isolating valve is fed in Fig. 3.
Fig. 5 is the schematic cross-sectional view of Fig. 4.
Fig. 6 be Fig. 3 in discharging isolating valve mutually assembled with discharge port snorkel after structural schematic diagram.
Fig. 7 is the schematic cross-sectional view of Fig. 6.
Fig. 8 is that the structure of purging gas nozzle is schematic diagram.
Fig. 9 is the schematic cross-sectional view of Fig. 8.
Wherein, corresponding relationship of the Fig. 1 into Fig. 9 between appended drawing reference and component names are as follows:
1, feed hopper, 2, vibration device, 3, control device, 4, feed hopper purging gas nozzle, 5, air inlet pipe, 6, transfer pot, 7,
Pressure sensor, 8, charging shock insulation set, 9, discharging shock insulation set, 10, level sensor, 11, charging isolating valve, 12, discharging isolation
Valve, 13, transfer pot purge gas nozzle, 14, exhaust valve, 15, charging valve plate, 16, feeding seal capsule, 17, discharging valve plate, 18, go out
Expect sealed bladder, 19, discharge port snorkel, 20, shell, 21, push rod, 22, spring, 23, frame, 24, charging cylinder.
Specific embodiment
For the purposes, technical schemes and advantages of this paper are more clearly understood, below in conjunction with attached drawing to the reality of this paper
Example is applied to be described in detail.It should be noted that in the absence of conflict, the spy in embodiment and embodiment in the application
Sign can mutual any combination.
Many details are explained in the following description in order to fully understand herein, still, can also be adopted herein
Implemented with other than the one described here mode, therefore, the protection scope of this paper is not by following public specific implementation
The limitation of example.
As shown in Figures 1 to 9, drilling platforms drilling cuttings conveying device provided by the invention, including frame 23, feed hopper 1, vibration
The side of frame 23 is arranged in dynamic device 2, transfer pot 6, air inlet pipe 5, pressure sensor 7 and control device 3, control device 3, into
Hopper 1 is for receiving material to be conveyed (that is: drilling cuttings), and feed hopper 1 is arranged in frame 23, and the feed inlet of feed hopper 1 is equipped with
Cylinder 24 is fed, the inner wall of charging cylinder 24 is equipped with level sensor 10, and vibration device 2 is arranged on the outer wall of feed hopper 1,
The discharge port of feed hopper 1 is connect with the import of transfer pot 6, and the entrance of transfer pot 6 is equipped with charging isolating valve 11, transfer pot 6
Exit be equipped with discharging isolating valve 12, air inlet pipe 5 is fixed on the outer wall of transfer pot 6, and one end of air inlet pipe protrude into it is defeated
In tank sending 6,6 top of transfer pot is equipped with exhaust valve 14 and pressure sensor 7, pressure sensor 7, vibration device 2, level sensor
10, isolating valve 11 is fed, discharging isolating valve 12 is electrically connected with control device 3.
In the above-mentioned technical solutions, as shown in Fig. 2, being equipped with charging shock insulation set 8 between charging cylinder 24 and feed hopper 1, into
Discharging shock insulation set 9 is equipped between hopper 1 and transfer pot 6.
In above-mentioned technology originating party case, as shown in figure 3, under being equipped on feed hopper 1 and the inner wall of transfer pot 6 for assisting
The purging gas nozzle of material is feed hopper purging gas nozzle 4 and transfer pot purging gas nozzle 13 respectively.
In the above-mentioned technical solutions, as shown in Figure 8 and Figure 9, purging gas nozzle includes shell 20, push rod 21 and spring 22, is pushed away
Bar 21 and spring 22 are mounted in shell 20, and spring 22 is set in outside push rod 21.When needing to purge in external pressed gas
Under the action of push 21 compressed spring 22 of push rod open gas nozzle；When supply interrupt when, push rod 21 is by gas under the action of spring 22
Mouth sealing.
In the above-mentioned technical solutions, as shown in figure 3, in feed hopper 1 and transfer pot 6 purge gas nozzle quantity be it is multiple,
It is such as 3~6.
In the above-mentioned technical solutions, as shown in Fig. 1, Fig. 6 and Fig. 7, discharge port snorkel 19 is equipped at the isolating valve 12 that discharges.
Discharge port snorkel 19 can assist discharge hole for discharge, prevent drilling cuttings from accumulating in discharge outlet and be compacted.Air inlet pipe 5, discharge port are logical
Tracheae 19 and feed hopper purging gas nozzle 4 and transfer pot purging gas nozzle 13 are respectively connected with switch valve, and switch valve is electrically connected with control device
It connects.
In the above-mentioned technical solutions, as shown in Figure 4 and Figure 5, charging isolating valve 11 includes charging valve seat, charging 15 and of valve plate
The top of charging valve plate 15 is arranged in feeding seal capsule 16, feeding seal capsule 16, and charging valve plate 15 is globoidal structure.Work as inlet valve
After plate 15 is closed in place, charging valve plate 15 is compressed and realizes sealing by the inflation of feeding seal capsule 16, before charging valve plate 15 is opened, into
Expect that the exhaust of sealed bladder 16 is unclamped with charging valve plate 15, charging valve plate 15 can rotate freely, and it can be and driven by stepper motor,
Stepper motor is electrically connected with control device.
In the above-mentioned technical solutions, as shown in Figure 6 and Figure 7, discharging isolating valve 12 includes discharging valve seat, 17 and of discharging valve plate
Discharge sealed bladder 18, and the end of discharging valve plate 17 is arranged in discharging sealed bladder 18, and discharging valve plate 17 is globoidal structure.Work as discharging
After valve plate 17 is closed in place, the discharging inflation of sealed bladder 18, which compresses discharging valve plate 17, realizes sealing；Before the unlatching of discharging valve plate 17,
The exhaust of sealed bladder 18 that discharges is unclamped with discharging valve plate 17, and discharging valve plate 17 can rotate freely；Discharge port is connected with discharge pipe,
Discharge port snorkel 19 is connected on discharge pipe side wall, when the discharging opening of isolating valve 12 is discharge port snorkel 19 and air inlet
Pipe 5 is passed through pressed gas, auxiliary drilling cuttings transport by opening respective switch valve.Switch valve can be solenoid valve etc., with gas
Pump is connected.
In the above-mentioned technical solutions, frame 23 is equipped with the control panel (being not drawn into figure) for manual operation, control
Panel is electrically connected with control device 3.
In the above-mentioned technical solutions, as shown in Figure 1, feed hopper 1 is up big and down small the taper bucket.
The control method of drilling platforms drilling cuttings conveying device provided by the invention, comprising:
Exhaust valve, the first valve and vibration device are opened, the second valve is closed, falls to the drilling cuttings collected in feed hopper
In transfer pot；
After drilling cuttings enters transfer pot, exhaust valve, the first valve and vibration device are closed, opens the second valve, air inlet pipe
It is passed through pressed gas with discharge port snorkel, by pressed gas by the drilling cuttings in transfer pot from the discharge port of transfer pot to unofficial biography
It is defeated.
It is controlled by automatic closed loop, improves automation degree of equipment, reduce operating personnel's working strength, improve
Operating environment enhances transfer efficiency of climbing, reduces equipment area occupied, realizes maximum environmental requirement.
The course of work of drilling platforms drilling cuttings conveying device are as follows:
Landwaste enters feed hopper 1, when landwaste fills up feed hopper 1, and the pressure in transfer pot 6 is lower than setting pressure, pressure
The data transmission that sensor 7 measures is opened to control device 3, exhaust valve 14, and the air in transfer pot 6 is discharged, and discharge isolating valve
12 close, and the control charging isolating valve 11 of control device 3 periodically circulation is opened, and drilling cuttings enters transfer pot 6 under the effect of gravity
In, the starting of vibration device 2 promotes material to enter transfer pot 6, has feed hopper purging gas nozzle 4 further in the bottom of feed hopper 1
Auxiliary discharge drilling cuttings enters transfer pot 6；
After constant time lag, vibration unit 2 stop, while or after very short delay, charging isolating valve 11 close,
After charging isolating valve 11 is closing and sealing off, there will be an of short duration delay, isolating valve 12 fully opens to allow to discharge, and is vented
Valve 14 and vibration device 2 are closed, while being introduced pressure air in transfer pot 6 by air inlet pipe 5 and discharge port snorkel 19, are led to
Excess pressure gas conveys drilling cuttings, and drilling cuttings will be discharged into pipeline from the outlet of transfer pot 6, and be transported to receiving point, the sky of short pulse
Gas also will purge gas nozzle 13 by transfer pot and introduce transfer pot 6 at regular intervals, to help drilling cuttings to put down during conveying
Quietly it is discharged；
When drilling cuttings has been drained off and transfer pot 6 has been drained off, discharge pressure declines in transfer pot 6, shows conveying
Most of useful work has been completed, and air inlet pipe 5 and discharge port snorkel 19 stop discharge pressure air, and exhaust valve 14 is opened.
When the discharge pressure complete attenuation in transfer pot 6, single cycle is completed.
After pressure complete attenuation, 7 trigger control device 3 of pressure sensor open charging isolating valve 11, close discharging every
From valve 12, new circulation is carried out.
Wherein, vibration device 2 is closed " movement " to prevent the drilling cuttings in feed hopper 1 and is compacted possible.In addition, in this dress
It sets after a period of use, can then operate normally the device by changing drilling cuttings into flushing liquor, the present apparatus can be carried out
Automatic cleaning, has saved labour, and cleaning speed is fast, effect is good.
In description herein, term " installation ", " connected ", " connection ", " fixation " etc. be shall be understood in a broad sense, for example,
" connection " may be fixed connection or may be dismantle connection, or integral connection；It can be directly connected, can also lead to
Intermediary is crossed to be indirectly connected.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning herein.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of this paper
In example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or example.
Moreover, the particular features, structures, materials, or characteristics of description can be in any one or more of the embodiments or examples with suitable
Mode combine.
Although embodiment disclosed herein is as above, the content only implementation of use herein for ease of understanding
Mode is not limited to herein.Technical staff in any this paper fields, do not depart from spirit disclosed herein and
Under the premise of range, any modification and variation, but the patent protection model of this paper can be carried out in the form and details of implementation
It encloses, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of drilling platforms drilling cuttings conveying device characterized by comprising
Feed hopper, for collecting drilling cuttings；
Vibration device is mounted on the feed hopper；
Transfer pot, positioned at the lower section of the feed hopper, the discharge port of the import of the transfer pot and the feed hopper passes through and can open
The first valve closed is connected, and the outlet of the transfer pot is equipped with the second valve to be opened/closed；
Air inlet pipe is connected with the transfer pot, for feeding pressed gas into the transfer pot；
Discharge port snorkel is connected on the discharge port side wall of the transfer pot, for blowing pressure outward from the discharge port
Gas；With
Exhaust pipe, one end is connected with the transfer pot, the other end is connected with exhaust valve.
2. drilling platforms drilling cuttings conveying device according to claim 1, which is characterized in that the feed hopper and transfer pot
The purging gas nozzle for assisting blanking is equipped on inner wall.
3. drilling platforms drilling cuttings conveying device according to claim 2, which is characterized in that further include:
Control device, the air inlet pipe, the discharge port snorkel and the purging gas nozzle are respectively connected with switch valve, the exhaust
It is connected with pressure sensor on pipe, level sensor, multiple switch valves, first valve are provided on the feed hopper
Door, second valve, the exhaust valve, the pressure sensor and the level sensor are electrically connected with the control device
It connects.
4. drilling platforms drilling cuttings conveying device according to claim 2 or 3, which is characterized in that the purging gas nozzle includes
Shell, push rod and spring, were formed with gas channel on the shell, and the push rod, which is movably installed on, described crosses gas channel
It goes up, to open and close the gas channel excessively, the spring is mounted between the shell and the push rod, for resetting
State push rod.
5. drilling platforms drilling cuttings conveying device according to claim 2 or 3, which is characterized in that the feed hopper and described
Purging gas nozzle in transfer pot is 3~6.
6. drilling platforms drilling cuttings conveying device according to claim 3, which is characterized in that the feed hopper is the taper bucket,
The vibration device is mounted on the lateral surface of the taper bucket, is provided with operation panel on the control device.
7. drilling platforms drilling cuttings conveying device according to claim 1, which is characterized in that
First valve and second valve are isolating valve, and the isolating valve includes valve seat, valve plate and sealed bladder, described
Material passing passage is formed on valve seat, the valve plate is installed in rotation in the material passing passage, and the sealed bladder is mounted on institute
It states in material passing passage, seals the material passing passage for matching with the valve plate.
8. drilling platforms drilling cuttings conveying device according to claim 1, which is characterized in that at the feed inlet of the feed hopper
Be provided with charging cylinder, between the charging cylinder and the feed inlet of the feed hopper and the discharge port of the feed hopper and
Vibration isolation set is provided between the import of the transfer pot.
9. drilling platforms drilling cuttings conveying device according to claim 1, which is characterized in that further include:
Frame, the feed hopper and the transfer pot are respectively mounted on said frame, and the vibration device is mounted on the charging
On the lateral surface of bucket.
10. a kind of control method of drilling platforms drilling cuttings conveying device characterized by comprising
Exhaust valve, the first valve and vibration device are opened, the second valve is closed, the drilling cuttings collected in feed hopper is made to fall to conveying
In tank；
After drilling cuttings enters transfer pot, exhaust valve, the first valve and vibration device are closed, opens the second valve, air inlet pipe and is gone out
Material mouth snorkel is passed through pressed gas, is transmitted the drilling cuttings in transfer pot outward from the discharge port of transfer pot by pressed gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810958743.8A CN108974947A (en) | 2018-08-22 | 2018-08-22 | A kind of drilling platforms drilling cuttings conveying device and its control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810958743.8A CN108974947A (en) | 2018-08-22 | 2018-08-22 | A kind of drilling platforms drilling cuttings conveying device and its control method |
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| CN108974947A true CN108974947A (en) | 2018-12-11 |
Family
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| CN201810958743.8A Pending CN108974947A (en) | 2018-08-22 | 2018-08-22 | A kind of drilling platforms drilling cuttings conveying device and its control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115231317A (en) * | 2022-08-29 | 2022-10-25 | 纽普兰能源科技(镇江)有限公司 | Positive-pressure air supplementing device for positive-negative integrated multifunctional pump and using method of positive-pressure air supplementing device |
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| CN115231317A (en) * | 2022-08-29 | 2022-10-25 | 纽普兰能源科技(镇江)有限公司 | Positive-pressure air supplementing device for positive-negative integrated multifunctional pump and using method of positive-pressure air supplementing device |
| CN115231317B (en) * | 2022-08-29 | 2023-11-14 | 纽普兰能源科技(镇江)有限公司 | Positive pressure air supplementing device for positive and negative integrated multifunctional pump and application method thereof |
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Application publication date: 20181211 |